# The Student Success Commons at York County Community College: MAT 126: Trigonometry

## Greek Letters

 Letter Name Uppercase Character Lowercase Character Alpha Α α Beta Β β Gamma Γ γ Delta Δ δ Epsilon Ε ε Zeta Ζ ζ Eta Η η Theta Θ θ Iota Ι ι Kappa Κ κ Lambda Λ λ Mu Μ μ Nu Ν ν Xi Ξ ξ Omicron Ο ο Pi Π π Rho Ρ ρ Sigma Σ σ Tau Τ τ Upsilon Υ Υ Phi Φ φ Chi Χ χ Psi Ψ ψ Omega Ω ω

#### How to Pronounce Greek Letters (American English) For Science and Mathematics:

Note: Though different than the above video, in your class you're more likely to hear mu is pronounced like "mew", nu is pronounced like "new" and upsilon is usually pronounced "oop·suh·laan".

## Trigonometry Summary

There are various ways to measure angles:

• Degrees: there are 360° in a circle
• Minutes (also called "a minute of arc", arcminute (arcmin), arc minute, or minute arc): Denoted by the symbol  and equal to 1/60 of one degree. There are 21,600 minutes in a circle
• Seconds (also called "a second of arc, arcsecond (arcsec), or arc second): Denoted by the symbol and equal to is 1/60 of an arcminute or 1/3600 of a degree. There are 1,296,000 seconds in a circle

Note: the minutes and seconds used in trigonometry do not refer to measures of time, they refer to angle measurements.

Click image to enlarge

## Unit Circle

(Click to enlarge)

Did you know you don't have to memorize the entire unit circle? Watch this video for a quick trick and some other great information.

Image courtesy of CueMath

### Student Success Commons at York County Community College

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